APA (7th ed.) Citation

Calkins, G. N. (1914). Biology. H. Holt and company.

Chicago Style (17th ed.) Citation

Calkins, Gary N. Biology. New York: H. Holt and company, 1914.

MLA (9th ed.) Citation

Calkins, Gary N. Biology. H. Holt and company, 1914.

Warning: These citations may not always be 100% accurate.